CALCIUM carbonate can exist in three polymorphic forms, which in the order of their usual stabilities are calcite, aragonite and vaterite. Calcite is the most stable and the least soluble ...

Found all over the world, calcite is the most stable form of calcium carbonate and is the main mineral found in limestone. We ...

Pennsylvania may not be the first place that comes to mind when thinking of gemstone mining, but the Keystone State has a surprising diversity of beautiful natural gemstones that can be found across ...

Calcite from Saint Joe Lead District, Missouri, U.S. (NMNH 134335). Calcite (calcium carbonate) is the first mineral to form from evaporation on Bennu. Gaylussite (white coating) from Searles Lake ...

A recent study examines the effectiveness of environmental strains for the production of biocement. The study's lead author, ...